POLYPHEMUS. Ill 



Family 2— POLYPHEMID^. 



PoiYPHEMiD^, Baird, Trans. Berw. Nat. Club, ii, 149, 1845. 

 — Dana, Proc. Amer. Acad. Arts and Sc, 1849. 



Character. — Four pairs of feet, not contained within 

 the shell. Eye very large. Inferior antennae two-branched, 

 one branch having four, the other three articulations. 

 Lower part of shell forming a large vacant space, for con- 

 taining the ova and young. 



This family contains two British genera, Polyphemus 

 and Evadne. 



Genus 1 — Polyphemus. 



Polyphemus, Mailer, Cuvier, Laireille, Straus., Edwards, &c. 

 MoNocuLUS, Lmnceus, Geojfroy, Be Geer, Fabricms, Jurine, &c. 

 Cephaloculus, Lamarck, Bosc. 



Character. — Head distinct from body. Abdomen long, 

 projecting externally from the shell. 



I. Polyphemus pediculus. Tab. XVII, fig. 1. 



MoNOCULUS PEDICULUS, LiiDimis, Pauu. Suec, No. 2048, 174G; Syst. 



Nat., ecUt. lOth, i, 635, No. 5 ; edit. 

 12tli, i, 1058, No. 5. 



— Gmelin, Limi. Syst. Nat., edit. 13tli, i, 3001, 



No. 5. 



— Fabricms, Eut. Syst., ii, 502 ; Sp. Ins., i, 374, 



No. 7; Mantissa Ins., i, 240, No. 7. 



— S'lilzer, Insecteu, t. 30, f. 8 a. 



— Manuel, Encyclop. meth., vii, 718, t. 263, f. 1. 

 MoKOCULUS PEDICULUS ramosus. Be Geer, Mem. pour serv. a I'Hist. 



Ins., vii, 467, t. 28, f. 9-13, 1778. 

 Polyphemus oculus, MiUlcr, Zool. Dan. Prod., No. 2417, 1776 ; 

 Eutomost., t. 20, f.] -5. 



— Cuvier, Tab. element., 456. 



— LatreUle, Hist. Nat. Crust., iv, 287 ; Genera 



Crust, et Ins., ii, 20. 



— Leach, Edin. Encyc., art. Crustaceology. 



